Harrods has warned some customers about a data breach involving their online systems. The luxury British department store said late Friday that names and contact details were taken after a third-party provider system was compromised. Harrods said that account passwords and payment details weren't affected. The company stated the incident was isolated and has been contained. Harrods said that it wasn't connected to a previous incident in May when hackers sought to gain access to its systems. Four people were arrested in July over their suspected involvement in cyberattacks against Harrods and other British retailers. Cyberattacks have targeted several high-profile British businesses recently.